155707664 has 20 divisors (see below), whose sum is σ = 344781504. Its totient is φ = 66731808.

The previous prime is 155707649. The next prime is 155707697. The reversal of 155707664 is 466707551.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695012 + ... + 695235.

Almost surely, 2^155707664 is an apocalyptic number.

155707664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155707664 is an abundant number, since it is smaller than the sum of its proper divisors (189073840).

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

155707664 is a wasteful number, since it uses less digits than its factorization.

155707664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390262 (or 1390256 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 155707664 is about 12478.2877030464. The cubic root of 155707664 is about 537.9847887980.

The spelling of 155707664 in words is "one hundred fifty-five million, seven hundred seven thousand, six hundred sixty-four".