78526713551 has 16 divisors (see below), whose sum is σ = 96266257920. Its totient is φ = 63031473120.

The previous prime is 78526713541. The next prime is 78526713631. The reversal of 78526713551 is 15531762587.

It is not a de Polignac number, because 78526713551 - 2¹⁸ = 78526451407 is a prime.

It is a super-2 number, since 2×78526713551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78526713551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78526713511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11934491 + ... + 11941068.

It is an arithmetic number, because the mean of its divisors is an integer number (6016641120).

Almost surely, 2^78526713551 is an apocalyptic number.

78526713551 is a deficient number, since it is larger than the sum of its proper divisors (17739544369).

78526713551 is a wasteful number, since it uses less digits than its factorization.

78526713551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23875606.

The product of its digits is 1764000, while the sum is 50.

The spelling of 78526713551 in words is "seventy-eight billion, five hundred twenty-six million, seven hundred thirteen thousand, five hundred fifty-one".