977423532551 has 4 divisors (see below), whose sum is σ = 978875871312. Its totient is φ = 975971193792.

The previous prime is 977423532497. The next prime is 977423532571. The reversal of 977423532551 is 155235324779.

977423532551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977423532551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 977423532493 and 977423532502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977423532571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726168371 + ... + 726169716.

It is an arithmetic number, because the mean of its divisors is an integer number (244718967828).

Almost surely, 2^977423532551 is an apocalyptic number.

977423532551 is a deficient number, since it is larger than the sum of its proper divisors (1452338761).

977423532551 is a wasteful number, since it uses less digits than its factorization.

977423532551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452338760.

The product of its digits is 7938000, while the sum is 53.

The spelling of 977423532551 in words is "nine hundred seventy-seven billion, four hundred twenty-three million, five hundred thirty-two thousand, five hundred fifty-one".