78946272490 has 24 divisors (see below), whose sum is σ = 148550330628. Its totient is φ = 30205528320.

The previous prime is 78946272437. The next prime is 78946272491. The reversal of 78946272490 is 9427264987.

It can be written as a sum of positive squares in 2 ways, for example, as 69583581369 + 9362691121 = 263787^2 + 96761^2 .

It is not an unprimeable number, because it can be changed into a prime (78946272491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7456551 + ... + 7467130.

Almost surely, 2^78946272490 is an apocalyptic number.

78946272490 is a deficient number, since it is larger than the sum of its proper divisors (69604058138).

78946272490 is a wasteful number, since it uses less digits than its factorization.

78946272490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14923734 (or 14923711 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 78946272490 in words is "seventy-eight billion, nine hundred forty-six million, two hundred seventy-two thousand, four hundred ninety".