54651778 has 4 divisors (see below), whose sum is σ = 81977670. Its totient is φ = 27325888.

The previous prime is 54651767. The next prime is 54651797. The reversal of 54651778 is 87715645.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34374769 + 20277009 = 5863^2 + 4503^2 .

It is a super-2 number, since 2×54651778² = 5973633677122568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13662943 + ... + 13662946.

Almost surely, 2^54651778 is an apocalyptic number.

54651778 is a deficient number, since it is larger than the sum of its proper divisors (27325892).

54651778 is a wasteful number, since it uses less digits than its factorization.

54651778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27325891.

The product of its digits is 235200, while the sum is 43.

The square root of 54651778 is about 7392.6840863113. The cubic root of 54651778 is about 379.4909573640.

The spelling of 54651778 in words is "fifty-four million, six hundred fifty-one thousand, seven hundred seventy-eight".