1550993964 has 24 divisors (see below), whose sum is σ = 3897369840. Its totient is φ = 477228864.

The previous prime is 1550993957. The next prime is 1550993971. The reversal of 1550993964 is 4693990551.

It is an interprime number because it is at equal distance from previous prime (1550993957) and next prime (1550993971).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4970979 + ... + 4971290.

It is an arithmetic number, because the mean of its divisors is an integer number (162390410).

Almost surely, 2^1550993964 is an apocalyptic number.

It is an amenable number.

1550993964 is an abundant number, since it is smaller than the sum of its proper divisors (2346375876).

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

1550993964 is a wasteful number, since it uses less digits than its factorization.

1550993964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9942289 (or 9942287 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 51.

The square root of 1550993964 is about 39382.6607023954. The cubic root of 1550993964 is about 1157.5418527038.

The spelling of 1550993964 in words is "one billion, five hundred fifty million, nine hundred ninety-three thousand, nine hundred sixty-four".