155970454 has 4 divisors (see below), whose sum is σ = 233955684. Its totient is φ = 77985226.

The previous prime is 155970443. The next prime is 155970469. The reversal of 155970454 is 454079551.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×155970454² = 48653565041932232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38992612 + ... + 38992615.

It is an arithmetic number, because the mean of its divisors is an integer number (58488921).

Almost surely, 2^155970454 is an apocalyptic number.

155970454 is a deficient number, since it is larger than the sum of its proper divisors (77985230).

155970454 is an equidigital number, since it uses as much as digits as its factorization.

155970454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77985229.

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 155970454 is about 12488.8131541792. The cubic root of 155970454 is about 538.2872735074.

The spelling of 155970454 in words is "one hundred fifty-five million, nine hundred seventy thousand, four hundred fifty-four".