7926402258978 has 64 divisors (see below), whose sum is σ = 19476809994240. Its totient is φ = 2099843557632.

The previous prime is 7926402258949. The next prime is 7926402259007. The reversal of 7926402258978 is 8798522046297.

It is an interprime number because it is at equal distance from previous prime (7926402258949) and next prime (7926402259007).

It is a super-2 number, since 2×7926402258978² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105630951 + ... + 105705962.

It is an arithmetic number, because the mean of its divisors is an integer number (304325156160).

Almost surely, 2^{7926402258978} is an apocalyptic number.

7926402258978 is an abundant number, since it is smaller than the sum of its proper divisors (11550407735262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7926402258978 is a wasteful number, since it uses less digits than its factorization.

7926402258978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211336991.

The product of its (nonzero) digits is 243855360, while the sum is 69.

The spelling of 7926402258978 in words is "seven trillion, nine hundred twenty-six billion, four hundred two million, two hundred fifty-eight thousand, nine hundred seventy-eight".