155696651 has 16 divisors (see below), whose sum is σ = 172451808. Its totient is φ = 139392000.

The previous prime is 155696647. The next prime is 155696657. The reversal of 155696651 is 156696551.

It is not a de Polignac number, because 155696651 - 2² = 155696647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155696657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391985 + ... + 392381.

It is an arithmetic number, because the mean of its divisors is an integer number (10778238).

Almost surely, 2^155696651 is an apocalyptic number.

155696651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155696651 is a deficient number, since it is larger than the sum of its proper divisors (16755157).

155696651 is a wasteful number, since it uses less digits than its factorization.

155696651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862.

The product of its digits is 243000, while the sum is 44.

The square root of 155696651 is about 12477.8464087358. The cubic root of 155696651 is about 537.9721048448.

The spelling of 155696651 in words is "one hundred fifty-five million, six hundred ninety-six thousand, six hundred fifty-one".