920311145978 has 24 divisors (see below), whose sum is σ = 1675668568032. Its totient is φ = 377270406744.

The previous prime is 920311145939. The next prime is 920311145993. The reversal of 920311145978 is 879541113029.

It is a super-2 number, since 2×920311145978² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204148400 + ... + 204152907.

It is an arithmetic number, because the mean of its divisors is an integer number (69819523668).

Almost surely, 2^920311145978 is an apocalyptic number.

920311145978 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

920311145978 is a deficient number, since it is larger than the sum of its proper divisors (755357422054).

920311145978 is a wasteful number, since it uses less digits than its factorization.

920311145978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408301346 (or 408301339 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 920311145978 in words is "nine hundred twenty billion, three hundred eleven million, one hundred forty-five thousand, nine hundred seventy-eight".